Blackwater Marine · Sebastian & Vero BeachExpert Marine Mechanics & Mobile Boat Repair.
Blackwater Marine delivers honest, thorough marine repairs in Sebastian, FL. Lead technician JT specializes in inboard and outboard diagnostics, dual battery and electrical troubleshooting, powerhead overhauls, lower unit service, and responsive mobile dockside callouts across Indian River County.
Blackwater Marine · 8025 129 Ct, Sebastian · 772-501-9844
Inboard & Outboard
Mercury, Yamaha, Honda, MerCruiser
Mobile Dockside
Vero Beach, Sebastian, slips & ramps
Marine Electrical
Battery drain, GFI & wiring diagnostics
Honest & Reliable
Thorough work done right the first time
Sebastian & Treasure Coast Marine Specialists
Knowledgeable, Fair-Priced Marine Repair at the Shop & Dockside.
At Blackwater Marine, JT brings exceptional knowledge, genuine reliability, and clear, stress-free communication to every boat owner on the Treasure Coast.
Instead of rushing into quick surface fixes or replacing unnecessary parts, JT spends the time to thoroughly assess the real problem — whether you are tracking down a parasitic battery drain on an inboard Meridian, servicing a 4-stroke outboard, rebuilding a lower unit, or stuck at your slip or ramp on the weekend.
From our Sebastian location at 8025 129 Ct to mobile dockside callouts right to your driveway, marina, or boat ramp in Vero Beach and Sebastian, we take your boat's reliability seriously.
What We Do
Complete Inboard, Outboard & Mobile Boat Repair.
Blackwater Marine provides expert inboard & outboard diagnostics, dual battery & electrical troubleshooting, mobile dockside service, valve adjustments, lower unit gearcase rebuilds, and scheduled 100-hour maintenance in Sebastian, Vero Beach, and Indian River County. Call 772-501-9844 to speak with JT.
Inboard & Outboard Diagnostics & Engine Repair
Comprehensive diagnostic testing, mechanical overhauls, and tune-ups for inboards and outboards — Mercury, Yamaha, Honda, Suzuki, MerCruiser, and Volvo Penta.
JT takes the time to properly assess every issue from root cause up, ensuring jobs are done right the first time without unnecessary parts.
Mobile Marine & Dockside Service
On-site troubleshooting, ramp callouts, and dockside repairs throughout Sebastian, Vero Beach, and Indian River County. Weekend availability when you're stuck.
Save the trailering hassle — JT comes directly to your home, dock, slip, or marina fully equipped with diagnostic tools and parts.
Marine Electrical & Dual Battery Systems
Complete marine electrical troubleshooting, battery bank isolation, port/starboard drain diagnostics, GFI switch wiring, chargers, and switch panels.
Meticulous electrical problem-solving so you never suffer parasitic battery drains, failed starts, or mysterious shorts on the water.
Powerhead, Valve Train & Engine Rebuilds
Deep mechanical repairs including valve adjustments, intake/carburetor service, cylinder head work, cooling passages, and complete engine swaps.
Precision craftsmanship with Snap-on professional marine tooling, careful torque specs, and thorough sea-testing.
Lower Unit, Gearcase & Water Pump Service
Lower unit reseals, gearcase rebuilds, water pump impeller replacement, prop shaft servicing, and midsection maintenance.
Prevent catastrophic gearcase blowouts and overheating with thorough inspection, pressure testing, and factory-spec fluid flushes.
100-Hour Service, Tune-Ups & Inspections
Scheduled 100-hour and annual services, fluid and filter changes, spark plugs, fuel system flushes, and pre-purchase vessel assessments.
Keep your vessel dependable season after season with transparent pricing, honest reporting, and clear communication.
Need Diagnostics, Electrical Repair, or Dockside Service?
Call JT at Blackwater Marine. Whether you have battery drain issues, engine performance problems, or need weekend emergency service at your slip or ramp, we respond quickly with honest, high-quality work.
Why Blackwater Marine
Sebastian & Treasure Coast Boat Repair Done Right.
01
Proper Diagnostics First
JT spends the time to properly assess the real problem so the job gets done right the first time, saving you money and hassle.
02
Mobile Dockside & Shop Service
JT travels directly to your home, dock, slip, or marina in Vero Beach and Sebastian, with full tooling and diagnostic equipment on board.
03
Weekend & Emergency Priority
Boats break down when you want to use them. JT makes customers a priority on weekends and when you're stuck at the dock or ramp.
04
Transparent & Fair Pricing
Clear communication from start to finish with honest recommendations, fair rates, and stress-free service every step of the way.
How It Works
Getting You Back on the Water Fast & Stress-Free.
01
Get in Touch
Call JT at 772-501-9844 or submit an inquiry with your vessel details, symptoms, or location in Sebastian or Vero Beach.
02
Thorough Assessment
We carefully troubleshoot electrical and mechanical problems down to root cause instead of rushing into quick band-aids or throwing parts at the issue.
03
Turn-Key Reliability
Repairs, valve adjustments, wiring, or scheduled services are completed cleanly, priced fairly, and tested for total saltwater peace of mind.
Ready to schedule service or need dockside assistance? Call JT at 772-501-9844 to get started.
Project Gallery
Real Marine Craftsmanship in Action.
Take a look at actual boat repairs, inboard engine bay wiring, valve train tuning, outboard powerhead servicing, and mobile trailer inspections handled by JT and Blackwater Marine.
Customer Reviews
What Boaters Say About JT & Blackwater Marine.
Verified 5-star reviews from boaters and families who count on JT and Blackwater Marine across Sebastian and Vero Beach.
"The customer service is top notch. JT is very knowledgeable inwith his craft. I was very impressed that a young person can have both of these skills sets. I recommend JT to all my friends and family. Keep up the great work."
Joe Rosa
"I highly recommend this boat mechanic company! JT did an excellent job servicing my father’s boat, and we were very happy with his work. He was professional, knowledgeable, reliable, and took the time to communicate everything clearly throughout the process. His communication was great, his prices were fair and reasonable, and he made the whole experience easy and stress-free. It’s not always easy to find a good boat mechanic. We truly appreciate his hard work and the service he provided. If you’re looking for a trustworthy boat mechanic who does quality work, I would absolutely recommend JT!!"
Yeritza Blanco
"JT at Blackwater Marine in Sebastian was outstanding. He spent the time to properly assess the problem so the job would be done right the first time, instead of rushing to a quick fix. He was available to us on the weekend and made us a priority, which meant a lot when we were stuck. We were having issues with both the port and starboard batteries on our inboard Meridian, and we were trying to figure out whether a failed GFI switch might have had something to do with the drain, or whether it was an unrelated problem. JT took that seriously and worked through it with us carefully. I would highly recommend JT and Blackwater Marine to any boater who wants honest, thorough work."
Michael Ciannilli
"Highly recommend Blackwater Maritime! JT came out to my house in Vero Beach and was professional from start to finish. Communication was excellent, he arrived on time, and kept me informed throughout the entire process. I would definitely use Blackwater Maritime again and recommend them to anyone looking for GOOD quality and affordable marine service!"
Lucas Sikora
Read More Reviews on Our Google Business Profile.
Check out verified Google reviews and directions to Blackwater Marine in Sebastian, FL.
Need Honest Marine Service in Sebastian or Vero Beach?
Tell JT what is happening with your boat, inboard or outboard motor, battery drain, or wiring. Blackwater Marine is ready to assist at our Sebastian location or mobile dockside at your slip, marina, or home.
Blackwater Marine · 8025 129 Ct, Sebastian, FL 32958, United States · 772-501-9844